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arXiv 2010.02018gr-qc
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通过第三次主导后牛顿序的引力自旋轨道和自旋$_1$ -自旋$_2$耦合

Gravitational spin-orbit and aligned spin$_1$-spin$_2$ couplings through third-subleading post-Newtonian orders

Andrea Antonelli, Chris Kavanagh, Mohammed Khalil, Jan Steinhoff, Justin Vines

摘要:

散射相遇的研究继续为广义相对论两体问题提供新的见解。对准自旋二进制的本地在时间上的保守动力学,对于未绑定和绑定的轨道,是完全编码的规范不变的散射角函数,这是最自然地表示在一个后闵可夫斯基(PM)的扩展,并表现出一个非常简单的依赖于两个机构的质量(在适当的几何变量)。这种依赖性将PM和小质量比近似联系起来,使引力自作用力结果能够确定质量比中所有阶次的新后牛顿(PN)信息。在本文中,我们利用相对论散射和自作用力理论之间的相互作用,获得第三次领先(4.5 PN)的自旋轨道动力学的一般自旋,和第三次领先(5 PN)的自旋$_1$ -自旋$_2$动力学的对齐自旋。我们进一步实现这些新的PN结果在一个有效的一体化框架,并通过与数值相对论模拟比较,证明了精度的提高。

英文摘要:

The study of scattering encounters continues to provide new insights into the general relativistic two-body problem. The local-in-time conservative dynamics of an aligned-spin binary, for both unbound and bound orbits, is fully encoded in the gauge-invariant scattering-angle function, which is most naturally expressed in a post-Minkowskian (PM) expansion, and which exhibits a remarkably simple dependence on the masses of the two bodies (in terms of appropriate geometric variables). This dependence links the PM and small-mass-ratio approximations, allowing gravitational self-force results to determine new post-Newtonian (PN) information to all orders in the mass ratio. In this paper, we exploit this interplay between relativistic scattering and self-force theory to obtain the third-subleading (4.5PN) spin-orbit dynamics for generic spins, and the third-subleading (5PN) spin$_1$-spin$_2$ dynamics for aligned spins. We further implement these novel PN results in an effective-one-body framework, and demonstrate the improvement in accuracy by comparing against numerical-relativity simulations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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